Anyone with an iPhone, iPad, or Mac computer can mirror or stream content from
their device onto the Apple TV.
If you are using an iPhone X or newer model, you will need to swipe down from the
top right of your phone screen, if you’re using an older model you’ll need to swipe
up from the bottom of your screen. Once you do, you’ll see an option for
‘Screen Mirroring’ or Airplay (possibly just the Airplay icon).
Once you press the Screen Mirroring or Airplay option on your device a 4-
digit code will appear on the Apple TV that you will need to put into your device,
once you've done this you will be connected and be able to mirror or stream from
your device.